Systems Engineering and Electronics ›› 2021, Vol. 43 ›› Issue (1): 83-90.doi: 10.3969/j.issn.1001-506X.2021.01.11

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Adaptive beamforming algorithm for airborne early warning radar based on SVRGD

Fang PENG1(), Jun WU2,*(), Shuai WANG1(), Jianjun XIANG1()   

  1. 1. Aeronautics and Astronautics Engineering School, Air Force Engineering University, Xi'an 710038, China
    2. Air Traffic Control and Navigation College, Air Force Engineering University, Xi'an 710051, China
  • Received:2020-06-10 Online:2020-12-25 Published:2020-12-30
  • Contact: Jun WU E-mail:wuboy0210@163.com;2320251817@qq.com;xiang787419@163.com

Abstract:

Adaptive beamforming is a key step of digital signal processing in airborne early warning radar. To solve the problem that the beamforming performance of traditional least mean square (LMS) algorithms is reduced under the condition of short snapshot and the algorithm tend to converge to local optimal value because iterative oscillation, an adaptive beamforming approach for stochastic variance reduction gradient descent (SVRGD) based on machine learning is proposed. Firstly, the data model of planar array receiving signal is established. Secondly, based on the stochastic gradient descent principle, the variance reduction method is introduced to modify the gradient through internal and external iteration for reducing the variance of the stochastic gradient estimation, and the algorithm model and implementation process are established. Finally, by setting up a planar array simulation scene, the performance of the SVRGD algorithm in the aspects of beamforming, anti-jamming and convergence speed is analyzed, and the excellent capability of algorithm in the background of short snapshot number, strong interference and noise is verified.

Key words: airborne early warning radar, adaptive beamforming, stochastic gradient descent (SGD), stochastic variance reduction gradient descent (SVRGD), machine learning

CLC Number: 

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